Piston-packing former and replacer.



No. 853,973. .PATBNTfiD M121, 1907'.

J J YHANNOW. Y

PISTON PACKING FORMER ANT REPLAGBR.

APPLICATION FILED MAR. 18, 1907.

2 SHEETS-SHEET 1.

MW Aizorneyf PATENTED MAY 21, 1907.

J. J. HANNON. PISTON PACKING FORMER AND REPLAGBR.

APPLICATION FILED MAR-l8, 1907.

2 SHEETS-SHEET 2 willwaaew .55 shown as snugly embracing. the;

packinsr and whensmrssrerssrmm 'JAMEs 'ANNJQ'N, or LocANsPoR-T, IN IANA;

' EST'ON-PACMWG FQRMEKR AND REPLACE-IR.

'. s cification ofLetter s Patent, I

. ratented May 2 1 1907. I

A puasoninasar h 13,19 7, 7 Serial n. 363,040;

To all whom it may concern: l 'Be it known that I, JAMES J. HAN N, a citizen of the United States, residing'at Loga-nsport, in the count of Cass and State of,

Indiana, have invente certain new and use ful Im rovements in Piston-Packing.Form-' d Replacers, of which the following-is ers an a full, clear, and exact specification. 4

This invention relates to a device for'forrm ing a leather packing u on a piston and maintaining the finished 'orm of such acking while the piston is inserted in As is well known, thisforin of piston'packing is in general use, notably for packing the the packing re uires frequent renewal and .re lacement wit1 the piston inthe cylinder, 7 which is found diflicu t, as

of the new packing cylinder readily.

One of the objects of my invention is to afl ordmeans to form the. packing intoproper 's'hape u'pon the piston-and to retain it in the several views: Figure 1 is a viewin longitudinal section of an air brake cylinder, the cylinder head being shown inside elevation, detached, and the piston beingshown as about entering the cylinder and embraced and guided by a device embodying my'inv'ention; Fi s. 2 and 3'are views inerspective, detached, of the parts-:ofimypa'cfiing former and replacer; Fig. 4 is.asideelevation'ofa device enibod .ing my invention, the parts being assemb ed; Fig. 5 is' a: diametrical ing at the mouth of. the forming end of my tions of the parts of my device, means' for interlockin the parts. f. :In thefdrawings, Fig. 1), I haveshown a (ylinder 1, with the I j etached, and the; piston,

teringi v-the cylinder with a newly applied head 2, the piston rod 4, 4 about 611:"

its cylinder;

the springy ed es. leather will not enter the ,position thereonfor ready insertion in thesection thereof; Fig. 6 is an elevation,lookpacking '15, ,5, the piston replacing ring being.

piston and seated on the en fiange'of the the'periphery of disk l, and snug and require fre uent 'wherisubjecte pistons of cylinders in air brake systems, and

.a, as shown. Exte'riorl' v "-madei'n two parts and, as device; Figs. 7 and 8 are, respectively, elevashowingthe te'ring perforations to receive a thum c linder in osition for insert 5 the piston- ,the cylihder. mg v common type, comprisinga maindisl; 4 Secured to th piston rodand aelam' disk. 4?,of less diameter, boltedvto dis .4','the. packing leather being cutin' theform off'a circular washer, the body 5 of whichis the bore of the cylinder.

.Pac'kings: of thisharacter replacement, especially 1 to the hard and constant- The piston head is of."

\ tightly clamped'between the disks 4 and 4*:ofQthdpiston, the edge fi 'being. turned a ainSt service of air brake systems, and much difii I culty is experienced and time consumedin,

inserting within the cylinder a piston fitted with anew packing which will best fulfil its intended purpose as the cupped edge 5*" springs outward and impinges against the end of the cylinder. To overcome this difii-'- culty I have devised a former and 'replacer J for these packings, I implement, comprising a former A (Fig. 3) to crimp disk 490i the piston and a replacer B 2),

consisting of a three-part""' or cup the packing upon the outer remov'ably secured to the former A, (Figs, 4

paclrin upon the cylinder. I c

The former A is an annular body of me 1 or other desired materiah-the interior"dian ie- 1 'ter of which at its inner end ,a coincides-with the bore of a c. linder of'giyen size, flaring thence outward provided at fdiamet'ric'al with lugs a our being shown) hooked,'as' bestshown in Fig. 3, to the re lacer B.' Tl fe replacer'also consists as a w ole of an annular body, its interior lie-" the piston and guide it 1.

. and 5), tohold. the skirt or edge p5 of the,

y-to its outer-end or' mouth f I the .former A is] y oppositepoints' with hand glkifps' a and atsuitable 1p,o'ints' detachablyfengage ing cylindrican'd. of a diameter to'..accuratel mate the inner end a I of the ,forr'neran therefore, the cylinder.

a hinge joint "6 and the free ends being-provided with lugs bf bfi havin' regi'sf. s rew 0 or equivalent-means, to lock the ,hing'ed' parts oif/the replacer- -securely togetherto' are shown as" outwardlyjflanged (see g. 2) the outerfiang i 7 shown, t es'e comprise eachpa half-annulus,'. .the' being fainted. by

: e meetin tpqfqmier I j .th 'jgdok g g of the former A, whereby the} former and iplacer may be locked together, and being provided with guide studs I)" to engage the cylinder flange, as will be explained.

" In practice, to remove a worn packing and replace it with a new one, the dpiston rod is the head 2 and rod and piston removed from the cylinder. The disk 4 and the worn packing are then removed and the replaccr and former, secured together, are passed over the disk 4 and onto the piston rod. Anew packing is now secured by disk 4 and the former A drawn over the piston, crimping or cuping the part 5" of the packing. When the mner edge of the former reaches the ed e of thepacking} it is unlocked from the replhcer and opening the parts of t and device capable of the function described. -Moreover, the replacer B may in some 1n- "stances be used inde bygiving it a partialturn to briiji the hooked lugs opposite the notches of the b and embracing the skirt of'the ackii'ig. 'The piston and replacer arenow ar vanced to the open end of the cylinder andthe guide studs 1) enga ed in the bolt holes of the cylimlor flange gee Fig. 1), when the piston may be readily thrust through the replac'er into the cylinder, the replacer removed from the position it has assumed between the cylinder and cylinder head byremoving the thumb screw e'replacer so they will pass the piston rod, when the cylinder head is again bolted to the cylinder and the pin 6 removed;

" It is not essential that the rcplacer B be given the specific form shown, but it is-required that the interior diameter correspond with the piston cylinder to be fitted and that it may be removed from between the cylinder and'cylinder headafter the piston with the new {)ackin is inserted within the cylinder,

inten that my claims cover broadly a endently of the former A, v for instance, wit thin, readily formed washers or packings for small air pump cyling with a given cylinder, tlie parts of the annulus being hinged at one point and provided with connecting means at an opposite point,-'.

and lugs on the face of said annulus adapted for registering with openings in the cylinder flange.

2. A piston packing former and replaccr comprising an annulus with flaring mouth;

and inner end having a diameter correspondmg with a given cylinder, and a separable v annulus having the same interior diameter as removed, thus leaving the replacer closely sponding with a given cy hndcr and an annuhis having the same interior diameter as the inner end of the former and dctacliably connected thereto.

4. A piston packing former and rcplaccr comprising an. annulus with a. flaring mouth and an inner end havirg a diameter corrospondiin with a given cyliiider, a separable annulus having the same interior diameter as the inner. end of the former, lugs on. said first named annulus adapted to engage recesses in the separable annulus, whereby the two may be detachably secured together, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES J. HANNON. 

